Actually a transfer of Bitcoin to another wallet is known as transaction and once the Bitcoin is fake it won't have any confirmation from the network and once is a fake Bitcoin transaction it won't include the transaction fee.
That alone shows that is being loaded
And once again after is received in your wallet wait for 20 minutes before re-checking your blockchain wallet.
There's no such thing as fake Bitcoin. You can't print or create new or fake bitcoins, there is a limited supply. The scammers take advantage of replace by fee which allows the person to double spend the transaction. You can always trust the Blockchain to give you an accurate result, use a Blockchain explorer like Blockchair to monitor your transactions and only pay when you have received at least 3 confirmations.